Fig. 1.

Difference in Cognition at 3.3-year Follow-Up versus Baseline across Tertiles of MTR peak height. a, STROOP test, difference in time (seconds) to complete test; (b and c): immediate and delayed Picture Word Learning Test (PWLT), difference in the average number of items reported correctly in 3 conditions requiring immediate recall (immediate PWLT) and the sum of the number of items correctly recalled in the delayed condition (delayed PWLT); (d): Letter Digit Coding test (LDCT), difference in the number of correct digits. Bar graphs represent means ± standard error of the mean. P-values are from repeated measures general linear model with post hoc Bonferroni test, which was used to investigate whether tertiles of MTR peak height at baseline relate to cognitive test performance at baseline and 3.3-year follow-up. * P < 0.05 and ** p < 0.01